In more detail
Duet was popularized on TikTok and is now mirrored by similar tools on Instagram Reels and YouTube. It is one of the main ways creators build on each other's content instead of just commenting. Common uses include reaction videos, harmonies and singing together, before-and-after setups, tutorials, and stitching a punchline onto someone else's clip. The original creator controls whether their video can be Dueted through their privacy settings, and the original audio plays alongside or under your own. Because both videos share the screen and the watch happens in one pass, Duets often ride the reach of the original, which makes them a fast way to enter a trend or tag onto a bigger account.
Example
A music teacher finds a student's singing clip and posts a Duet where they harmonize next to it, so both voices play together in the same video. Their video appears split-screen: the student on the left, the teacher on the right.
FAQ
